Blood Volume Estimator

Estimate total blood volume based on body weight, sex, and body type category. This is a rough physiology reference, not a clinical measurement.

Use your current total body weight.
Used for general blood volume per kg estimates.
Used only for a rough adjustment.
Children and infants have different typical ranges.
Choose how the result should appear.
Choose result precision.
How we calculate

Blood volume is estimated from body weight using an approximate milliliters-per-kilogram factor. Adults often fall in a broad range around 60–75 mL/kg, while children and infants may differ.